3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Service Engine Light... came on, went off

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Old 10-26-2003, 12:03 PM
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Service Engine Light... came on, went off

last night i was driving and the light went on... then after about 10 minutes it went off... i was driving around in the city, no more than 35, 40 mph when this happened.... is there any way i can find out what code it shot out? i wouldnt think it was too serious since it went off without me turning off the car, but i still wanna know what it could be so i can prevent it from happening again. maybe it was my vss? cuz my speedometer's fubar right now and i noticed it didn't work at all while the SES light came on... after it went off, it still didnt work for about 5 minutes, and then it worked... would that cause an SES light? thanks guys

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Old 10-26-2003, 01:48 PM
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Yep, VSS. I still haven't hooked mine up from the T56 swap and it'll come on then go off then back on etc.

-Rippin
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Old 10-26-2003, 03:14 PM
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Sounds like the VSS but you can never be sure. Check the error codes by shorting out the A and B terminal of the ALDL. If it gives a VSS code then it would be time to look at the VSS connector to make sure it is tight. If so, take it out and look at the driven gear and see that all the teeth are there. Have the rear end up and check by turning the rear wheels to make sure the drive gear has all the teeth. If those are fine then replace VSS. If the drive or driven gear has a few chunks missing, changing the VSS 10 times will not help.
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Old 10-26-2003, 03:45 PM
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this would be my first time checking for codes... where would it blink? on the dash?
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Old 10-26-2003, 04:09 PM
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http://www.thirdgen.org/newdesign/faq/thirdgen.shtml

Go to the Misc section


The ALDL should be next to the fuses on the underside of the dash.
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